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The importantance of Proper Fuel & Spark Quality

GSX1300R Hayabusa

Busa Wiki: Technical Revisions from Gen 1 included Engine changes consisted of an increase in stroke by 2 mm, enlarging displacement to 1,340 cc (82 cu in). The compression ratio was boosted from 11:1 to 12.5:1 and the cylinder head was made more compact and was given lighter titanium valves, saving 14.1 g (0.50 oz) and 11.7 g (0.41 oz) on each intake and exhaust valve, respectively. The valves were driven by a chain with a new hydraulic tensioner. The pistons were made lighter by 1.4 g (0.049 oz)[44] and used ion-coated rings and shot peened connecting rods. The crankcase breather system had reed valves added to control pressure waves in the intake airbox, a way of avoiding power loss. Fuel injectors from the GSX-R1000 were used, with smaller 44-millimetre (2 in) throttle bodies, called the Suzuki Dual Throttle Valve (SDTV) system. It has three selectable options of power delivery for a range of touring to wide open high performance. The exhaust system was overhauled, using a 4-2-1-2 system, meaning four exhaust outlets merging into two pipes, and then joining into a single pipe before splitting into two enlarged, quieter mufflers, which added a few pounds of weight compared to the first generation Hayabusa. The exhaust also included a catalytic converter and an oxygen sensor in order to meet Euro 3 emissions requirements. The suspension was upgraded with a 43 mm Kayaba inverted fork with sliders having a diamond-like carbon (DLC) coating. The rear shock is also a Kayaba, and the overall suspension is firmer than the previous model. The swingarm is similar in design to the old one, but was strengthened. Front and rear remain fully adjustable. The transmission was given a heavier-duty, slipper clutch. The final drive ratio was slightly lower, and gears 5-6 were spaced farther apart, and gear ratios 1-2 moved closer together. Ergonomic and cosmetic changes for the 2008 model include a higher windscreen, and interlocking gauge faces with a digital speedometer, as well as a new gear indicator and adjustable shift light. The fairing fasteners were hidden to uncomplicate custom paint work. The twin-spar aluminum frame was carried over from the previous version, and wheelbase, rake/trail, and seat height were the same, while overall length grew by two inches, and the taller windscreen added about ½ inch. Weight was saved by omitting the centerstand. Technical improvements in the chassis include Tokico radial brake calipers, allowing smaller discs and therefore lower unsprung weight, translating into superior handling. Increased front braking power necessitated a sturdier lower triple clamp. The rear brake caliper was moved to the top of the disc, giving a cleaner visual appearance. New 17 inch wheels were designed, using Bridgestone BT-015 radials taken almost directly from the GSX-R1000. Other changes were a steering damper with a reservoir and dual cooling fans with a larger, curved radiator. Because of increased vibration from the longer stroke, the fuel tank was put on floating mounts. All told, the changes for 2008 resulted in a dry weight of 490 lb (222 kg), 5 lb (2 kg) heavier than the prior generation. -Read More

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